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试验设置不同耕作方式和秸秆还田处理,在2008年10月小麦播种后,分别在0天、1天、4天、8天、15天、30天和45天的7个取样时间调查了试验小区土壤动物群落。结果表明:(1)土壤动物在0～8天处于耕作干扰阶段,其丰富度呈下降趋势。8天后土壤动物表现为恢复增长阶段,丰富度得到了显著的增加。(2)在耕作干扰阶段,大型土壤动物中鞘翅目和双翅目受耕作活动干扰较小,而膜翅目和大蚓类表现敏感。小型土壤动物中,双尾目和小蚓类对耕作活动干扰较小,而弹尾目和蜱螨目较为敏感。(3)通过多元典范冗余分析(RDA)建立基本响应曲线(PRC)得到,在恢复增长阶段,翻耕处理比免耕处理下有更高的土壤动物丰富度,而秸秆还田量越大,土壤动物丰富度越高。
The experiment set up different tillage methods and straw returning treatment. After the wheat was sown in October 2008, the experiment was investigated at seven sampling days of 0, 1, 4, 8, 15, 30 and 45 days Community Soil fauna community. The results showed that: (1) Soil fauna was in the disturbance stage of tillage from 0 to 8 days, and its abundance showed a decreasing trend. After 8 days, soil animals showed a stage of recovery and growth, and their abundance has been significantly increased. (2) In the stage of tillage disturbance, the coleoptera and diptera in large soil animals had less interference with tillage activities, while the Hymenoptera and the earthworm were sensitive. In small soil fauna, the two-tailed metamorphopsia and the small earthworm had less interference with tillage activities, while the flies and the acarina were more sensitive. (3) Through the establishment of the basic response curve (PRC) by multiple model redundancy analysis (RDA), in the stage of restoration and growth, the plow treatment has higher soil animal abundance than the no-tillage treatment, and the greater the straw returning amount , The higher the soil animal richness.